Cache Manifest for Ext JS applications

Is Sencha CMD 5.1.2.52 ready to make Ext JS apps compatible with cache Manifest? I really need to cache app.js in manifest file via Sencha CMD like sencha touch apps does. Any solution to make it works using sencha cmd? Any plan for enable it for Ext JS apps?

I tried this using production build. I did find a cache.appcache file generated but my index.html was not modified to reference the manifest, and at runtime the browser never ask for cache.appcache, and of course nothing is cached. Any idea?Good reference about the subject -> http://www.html5rocks.com/en/tutoria...cache/beginner

In order for this to work, your source html must contain an empty manifest attribute in the root html node

Great, it's working.

Was this documented somewhere? Should I have received a warning or error, when I enabled caching, but my index.html didn't have that?

So now, the only thing cached is my index.html. Do I have to manually add all the file generated by the theme that is compiled by the build or we have ways to get this automatically added to the manifest/app.json?

What is the smaller work/configuration to get everything cached?

I was some thread mentioning 'delta' file, is that related, what is this about?

As you can see I have added in production config to cache with the build.timestamp, then files always will have the same _dc parameter. this gives a "timestamp version" for files that will be loaded by microloader.

Microloader always load the app.js_dc?myBuildTimeStampHere.
The manifest file is generated perfectly but the manifest file doesn't put the _dc in cached files

The following comment under CACHE MANIFEST: # f1afc0edff32327fd8488ae7d9b0b04009aacabdIs not updated between build for me, which is super huge issue. That make the browser believe nothing changed.I assumed the purpose of this number is to make the browser realize that files have changed. How can I force this number to always change?